I've researched this as well. It's really not hard to do this mod and the parts are relatively cheap and easy to acquire.

With that being said, yes you are paying a premium for his product. His lights are milled to fit the CNC brackets that he makes for the kits, the wiring is done very neatly, they are modular (you can add or delete lights as you need) and he includes a switch for you to turn the lights on and off as you like. I'm not in any way affiliated with him, I've just looked into his product as well as the other options (the 3-D printed ones with the circular lights, for example). If you want something that is pretty much custom, easy to install, with less hassle and is pretty nice, it's a good option